Dual typewriting machine



March J6 1926. 1,576,858

y F. SHOLES DUAL 'rwnl'rluc MACHINE Filed Feb. 23, 1922 3 Sheets-Sheet 1 y s 'zluvenrm TronNE-v.

March4 16 1926. 1,576,858

F. sHLEs DUAL TYPEWRITING MACHINE Filed Feb. 23, 1922 I :5 sheets-sheet 2 llllllllllll umu m! mm n y INvrNToR:

- F. sHoLlzsY DUAL TYPEWRITING MACHINE Filed Feb. 23. 192 5 Sheets-sheet 3- I NvI-FNTR ATTORNEY.

Patented Mar. 16, 1926.

PATENT OFFICE.

IER13IHERMII SHOLES, 0F CHICAGO, ILLINOIS, ASSIGNOR TO MORLEY MULTIPLE TYPE- WRITER SALES CORPORATION, A CRPORATION OF INDIANA.

DUAL TYPEWRITING MACHINE.

Application led February To all whom t may concern.'

Be it known that if, Funnnnrck Sirenas, a citizen of the United States of America, and resident ot' Chicago, in the county of Cook and State ci Illinois, have invented certain new and useful Improvements in Dual Typewriting Machines, of which the following is a specification.

This invention relates to improvements in dual typewriting machines of that class in which more than one set of type-bars are actuated by a single set of keys. The objects of the invention are: irst, to provide a simple and compact mechanism for trans'- mitting movement from Athe keys to both sets ot type-bars; second, to provide a means of conveniently disconnecting one set .of type-bars from actuated relation with the keys; and third, to provide a means et automatically increasing the tension applied to the universal bar that co-operates with the keybars, when the one set of type-bars are disengaged from operating connection.

The above objects are accomplished by the construction illustrated in the accompanying drawings in which Fig. 1 is a front elevation l-of a dual typewriter embodying` the present invention, a portion being broken away, and other part-s immaterial to the present invention being omitted;

Fig. 2 is a plan view of the grouped rccking members that constitute means for transmitting movement from the key-bars to the type-bars of both sets;

Fig. 3 is a vertical section of Fig. 1 on the line 3-3 thereof;

Fig. l is a rear elevation of the secondary or duplicating part of the machine;

Fig'. 5 is a detail in perspective showing a single unit including dual type-bars, the key-bar for same and the mechanism for transmitting movement from the key-bar to the type-bars, also the mechanism for disconnecting. one of the type-bars from actuated relation with the key-bar, parts being broken away;

Fig. 6 is a detail view showing a side elevation of the detachable connection between one of the secondary intermediate levers and its connecting rod, parts being in section; and

Fig. 7 is a plan view showing the head of 23 1922. Serial No. 538,439.

the detachable connecting rod, and the in termediate lever, the lever being in section at the point of its connection in the head oi the connecting rod.

The characters appearing in the'description 'referto parts shown in the drawings and designated thereon by corresponding characters. y a

The invention comprises a master typewriting rmachine .1 and a secondary typewriting machine 2, each having a set of type-bars 3 and al. respectively, that operate 1n conjunction with corresponding platens .fi- 6. The mechanism constituting the two typewritingmachines is assembled in a common frame zontal rails 8 for the support of a carriage 9, there being' rollers 10 on the carriage that have bearing relation with the rails. The platens are .mounted in the trent portion 11 of thel carriage that yis hinged as indicated at 12, and a'rail 13 on the hinged portion rests upon a roller 14. on the frame to receive support at its front. The movement of the carriage is controlled by es'capement mechanism lwvhich 'may be of any suitable type.

The master machine has a group of keybars or levers 16 each of which is sustained by a corresponding spring 17 and is adapted to depress the universal bar 19 that is pivot-ed in the frame beneath the group of key-bars. The universal bar is sustained having a pair of hori-V by a tension spring 2() that depends from a Y bell-crank 21 which is pivoted in the frame and has'actuated relation. with' an adjusting bar 22. i Y

Each key-bar 16 has a link connection 2S with an arm Qeion a vCorrespending` rockshat't 25 by which oscillating movement is imparted to the rock-shaft vwhen the keybar is actuated. Each rOckshat has another arm 26 extending at an angle from the former `arm Q11-, which has a link connection 27 with. a correspondii'ig intermediate lever 28 that has pivotal support at its lower yend in the frame. Also each typerbar 3 has a link connection 29 with the corresponding intermediate lever 28, so that as the various key-bars are manipulated the type-bars will be accordingly actuated.

A special-feature of the invention consists oi the rock-s'hafts'Z and the manner in which they are arranged. These rock-' shafts are in groups of Various lengths, the group 3() being the shortest and positioned horizontally in a vertical vseries and the group i231 b eing lfonger and positioned ad-v jacent the first group, while each succeeding group is of greater length than the preceding group 'as shown in rig. 2. The rockshatts thus grouped 'are held 'in' position by suitable brackets 32 that extendy .from a supporting bar 33 in the frame. Except as to length the roclr-sha`ft members vare alike, each having an arm 34 at its end opposite its angular arms andQG The arm 34 of each roek-shaiit has la latch connection 35 with va`Correspending intermediate lever 3G inthe 4secondary machine by which n'iovement is imparted to the intermediate lever `when the corresponding key of the master machine is manipulated, the movement being imparted through the medium of the roclnshatt 25. Each latch connection has an elongated .loop 87 through which the intermediate lever 36 loosely ein lends, and 'the lever has a jaw 38 adapted to have engagement with a latch-pin S2) in the looped head of t-he connection 35V so that when thus engaged the connection and lever will be actuated together. The intermediate lever 36 has also `a link connection 4.0 with the corresponding type-bar 4 of the secondary machine by which the typebar is actuated.

As a means of throwing the latch con'- n'ections 35 out offengagement with their intermediate levers, fa guide, consisting of a movable bar 4l and rod 42 arranged inparallel relation with each other and spaced apart, `is positioned so that the looped ends 37 of the connections '35 extend loosely between the bar and the rod. The rodv 42 'eX- tends through pendant ears 43 on the bar 4l and the ends oi" the rod are bent to form arms 44 which are connected respectively with actuating arms 45 that extend from an oscillating shaft 46 that is lmounted in the vframe. The shaft 46 also has a pendant/arm 47 which may be a continuation ot one of the arms 45, the pendant arm being connected `with the adjusting bar 22. A stop 48 on the frame is positioned so fas to limit movement ofy the shaft 46 iin one di rection by engaging one of Vthe arms 45 at which time the heads en the connections 35 are held in latched connection with the corresponding intermediate leversrby the guide. Tension spr-ing 49 connecting the shaft 46 with the corresponding ears 43 on the ba'r tend to hold the guide in normal position. By :manipulating the adjusting bar 22 the shaft `46 'may beoscillatedso that the guide will be 'elevated sufficiently Kto litt the latch connections 35 from engagement with their intermediate levers. In 'this manner the type-bars .4 of the secondary machine are rendered inoperative.

The adjusting bar 22 is longitudinally movable and is provided with a pin 50 for engagement in holes 5l in the frame of the machine for holding the lever in its opposite positions of adjustment.

In the operation of the invention the paper toy vbe written upon is applied in a separate-'sheet to each platen in the ordinary manner, and while the adjusting bar '22 is in its outermost position, the key-bars of the master machine are manipulated as in the operation of an ordinary typewriter. As the movements of the key-bars are iinparted to the type-bars of both the master and secondary machines, ythe manuscript is simultaneously imprinted on the sheets carried by the platens.

If it be desired to produce but one manuscript, the master machine may be operated separately by shifting the adjusting bar Q62 -to its innermost position so that the type bars of the secondary `machine are .rci'idered inoperative while the `type-bars of the inaster machine remain operative. Also, when ythe adjusting bar is shifted to its iniiermost position the bell-crank 2l is accordingly moved thereby and the tension ot ihe spring Q0 is increased and the resistance oi the universal bar 19 to the action ot the key-ars thus becomes greater. compensated the decrease et force required in operating the key-bars when the type-bars of the secondary machine are disconnected, and thus, the touch l of the keys of the. master machine is preserved when the secondary machine is thrown out of action.

That I claim is l. ln dual typewrliting apparatus having niast-er and secondary sets ot type-bars and corresponding platens, a single set o'l' keybars; a set ot rock-shafts grouped together in a loose pack, each having at one end a pair of arms and at its opposite end a single arm; a link connection between each rkevbar and one or' said pair ot arms ot tue corresponding rock-shaft; a group ot intermediate levers having actuating relation with the master set oiitype-bars; a link connection between each 'oit said levers a 'd the other a 1m of said pair ot arms o'l fthe correspending 'roclvsha-zits 'a secondary group of intermediate levers having actuating relation respectively with the secondary set ot type-bars; a `latch connection between the "single arm. et eac-h rock-shaft and the con responding lever of' 'the secondary group; a movable guide for said latch coniiect-ions adapted fto collectively disengage the same from actuating relation with the secondary levers; adjusting means controlling the guide; a universal bar depressible by said key-bars; and a v'tension device having sustaining relation with the universal bar and connection with said adjusting means by whichffthe sustaining tension or' said device In this manner llO is Iincreased when the latch connections are disengaged.

2. In dual typewriting apparatus having master and secondary sets ot type-hars and corresponding platens (zo-operative therewith, a single set ot key-bars havine actuating relation with the master set ot typehars; a set ot rock-shafts grouped together in a loose pack, having actuated relation re- ;ipectively with said key-hars and actuating relation respectively with the type-bars ot' the secondary set; adjusting means for collectively disengagii'ig the type-bars of the secondary set from actuating relation with the rocleshaffts; a universal bar depressible hy said key-bars; and a tension device havingl sustaining relation with the universal bar and connection with said adjusting means by which the sustaining tension ot said device is increased when the secondary set of type-bars are thrown out of action.

In dual typewriting apparatus having master and secondary sets of type-bars and corresponding platens co-operatively associated therewith, a set of rock-shafts grouped together in a loose pack having actuating relation respectively with the corresponding type-bars ot both the master and secondary sets; said type-bars of the secondary set and rock-shafts being detaehahly connected; a set of key-hars having actuating relation respectively with the corresponding rockshafts; and a tension device for the key-bars operable to increase its tension when said secondary type-hars are detached.

4t. In dual typewriting apparatus having master and secondary sets ot type-hais and corresponding platens co-operat-ively associated therewith, a set of key-harsg mechanism having actuated relation with the respective key-bars and corresponding connections with the respective type-bars of the master and secondary sets for actuating the same, the connections with the type-bars oi the secondary set being detachable; a tension mechanism depressible by the key-bars; and an adjusting means adapted to collectivelyY disengagek the detachable connections and having adjusting relation with said tension mechanism so arranged that the sustaining tension thereof is increased simultaneously ith the disengagement of said connections.

In dual typewriting apparatus having two sets of type-bars operated by a single set of keys, an adjusting means for collectively throwing one set of type-bars out of action; a universal har depressihle by the key-bars; a tension device for sustaining the universal bar; and a connection between said adjusting means and tension devicev adapted to increase the sustaining tension of said device when said one set ot type-hars are thrown out of action.

In testimony whereof I aiiiX my signature.

FREDERICK SI-IOLES. 

